Take-up mechanism for looms.



A. E. RHOADES.

TAKE-UP MECHANISM FOR LOOMS APPLIOATION FILED JULY 20. 1908.

9 1 3,9 1 5 Patented Mar. 2, 1909.

TH: No. ms PETERS cm, WASHINGTON. A c.

UNITED STATES PATENT OFFICE.

ALONZO E. RHOADES, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPERCOMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

TAKE-UP MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed. July 20, 1908. Serial No. 444,485.

To all whom it may concern:

Be it known that I, ALoNzo E. RHOADES, a citizen of the United States,and resident of Hopedale, county of Worcester, State of Massachusetts,have invented an Improvement in Take-Up Mechanism for Looms, of whichthe following description, in connection with the accompanying drawing,is a specification, like numerals on the drawing representing likeparts.

This invention relates to that type of takeup mechanism for loomswherein means are provided to ermit a predetermined amount of let-back wen the operation of the take-up is arrested upon a change in the normaloperation of the 100111, such for instance as a change'of fillingfollowing fillin failure, in order to prevent the formation of thinplaces or stri es in the cloth. Such let-back is he quenty effected bymaking use of a so-ealled let-back pawl, which is brought into actionwhen the take-up mechanism is released temporarily from tie control ofits actuating means, such pawl being arranged to let back the cloth forone pick, or for several picks, as desired. This pawl ordinarily restsupon and clicks over the teeth of the ratchet with which it cooperates,and it is found in practice that the pawl becomes unduly worn by itsconstant engagement with the ratchet, tending to improper action whenthe pawl is called upon to exercise its proper let-back function.

My present invention has for its object the production of means wherebythe let-back pawl is maintained out of contact or engagement with itscooperating member until such time as let-back is called for, whereuponthe pawl is at once and automatically placed in position to operate.

I have herein shown my invention as applied to a take-up mechanismoperated by a positively and continuously rotating driving oractuatingmember, such for instance substantially as is shown in UnitedStates patent to Emery, No. 648,903, dated May 1, 1900, though with amodified construction and arrangement in certain particulars to bereferred to hereinafter.

Figure ,1 is a front elevation of the take-up mechanism of a loom, withone form of my present invention embodied therein; Fig. 2 is a left-handside elevation of the mechanism shown inFig. 1; Fig. 3 is an enlargeddetail in front elevation of the controller for the let back pawl, to bereferred to; Fig. 4 is a detail in side elevation of the let-back pawland the ratchet with which it cooperates, and the controller for suchpawl.

The take-up roll 1, its attached gear 2, intermediate gear 3 driven bythe pinion 4 to which is attached a larger pinion 5 meshing with thepinion 6, the large gear 7 to which pinion 6 is attached, and the smallgear 8 in continuous mesh with the gear 7 and having an attached ratchet9, rotatably mounted on the shaft 10, may be and are all ofsubstantially well known construction, whereby motion from the gear 8 istransmitted to the take-up roll.

As in the Emery patent a worm 12 on a constantly rotating shaft 11meshes with a worm-gear 13 fast on the shaft 10, rotatable in thebearing 14, but herein I have shown clutch-teeth 15, Fig. 4, on thedriven gear 8, adapted to cooperate with clutch-teeth 16 on the movablemember 17 of the clutch, said member rotating with the shaft 10 andbeing movable longitudinally thereon. A yoke 18 fulcrumed at 19 servesto release the two series of clutch-teeth and a spring 20, Fig. 1,effects their cooperation, said yoke having a depending, cam-likeextension 21 for a purpose to be referred to, and the yoke is connectedby a link 22 with an arm 23, Figs. 1 and 2, loose on a rock-shaft 24,which latter may when turned efl'ect automatic filling replenishment ina well known manner. Such turning may be effected by a filling-feelermechanism acting through arm 25, fast on the rock-shaft, when thefilling in the running shuttle is exhausted to a predetermined extent.The arm 23 has rigidly connected with it an upturned extension 26, Fig.1, adapted to be swung outward by the movement of the usual fork-slide(not shown) when filling absence is detected, as in the Emery patent.When the extension 26 is thus acted upon the link 22 is depressed andthereby the yoke 18 releases the clutch by disengaging the series ofteeth 15 and 16, so that the take-up mechanism is released temporarilyfrom the control of its driving or actuating means. WVhen so releasedletback is effected, and this is provided for by the slotted let-backpawl 27, pivotally and slidably mounted on a stud 28 on the stand 29rigidly secured to the cloth roll guide 30, the pawl when cooperatingwith the ratchet 9 permitting let-back a predetermined distance, as willbe familiar to those skilled in the art.

I make no claim to the clutch connection between the shaft 10 and thetrain of gearing connected with the take-up roll, nor to the control ofthe clutch by or through the yoke and the link 22, as the same are notof my invention, and are illustrated herein as a convenient form ofapparatus.

In accordance with my present invention I allelism.

When the clutch is in operation the link 22 maintains the bracket 31 atsuch a height that the detent finger 35 of controller 34, en gaging thelug 36, will hold the let-back pawl 27 up and wholly free from contactwith the ratchet 9, as best shown in Fig. 4, and less clearly in Fig. 2.Upon release of the clutch by downward movement of the link 22, asdescribed, the bracket 31 is lowered and the controller 34 is rocked onits fulcrum 33, by the swing of the extension 38, so that the finger 35releases the let-back pawl and it drops instantly into engagement withthe ratchet 9, and then permits retrograde movement, or let-back, of thelatter the predetermined amount. Return of link and yoke to normalposition causes the controller to auto matically disengage the let-backpawl from the ratchet and retain said pawl in the posi-- tion shown inFig. 4 until let-back is again called for.

The shipper 39 may be released by the action of a warpstopmotion, bymeans of the arm 40 having a cam-slot 41, Figs. 1 and 2, cooperatingwith the shipper, said arm being fast on a rock-shaft 42, and turned bylongitudinal movement of a link 43, Fig. 2, as in the patent to JamiesonNo. 729,593 dated June 2, 1903 when a warp fault occurs.

I have shown a wiper 44 fast on the shaft 42, adapted to cooperate withthe cam-like extension 21 of the yoke 18, so that when the said shaft isturned at the time of loom stoppage the coo eration of the wiper andyokeextension wi operate the yoke and release the clutch. At such timethe movement of the yoke acts through its upward extension 38 to rockthe controller 34 and thereby throw into 0 eration the let-back pawl. Asthe link 22 wi I also tend to be drawn downward by such operation of theyoke I have provided a slot-and-pin connection 22 between said link andthe arm 23, to avoid any movement of said arm and its extension 25.

, From the foregoing description and the drawings it will be manifestthat while provision is made for let-back the cooperating members of thelet-back device, herein the pawl 27 and ratchet 9, are normally out ofcontact, wholly and absolutely, and are only permitted to cooperate whenlet-back is called for, whereby the unnecessary wear of the parts of thelet-back device is altogether obviated.

Various changes or modifications in details of construction andarrangement may be made by those skilled in the art without departingfrom the spirit and scope of my invention as set forth in the claimsannexed hereto.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent is 1. The combination with take-up mechanism,and actuating means therefor, of means to effect automatically temporaryrelease of said mechanism from the control of its actuating means, alet-back device, comprising a ratchet and a let=back pawl, and means topermit engagement and cooperation of said pawl and ratchet only whensuch tem orary release of the take-up mechanism is e ected.

2. In a loom, in combination, take-up mechanism, a let-back pawl and aratchet with which it cooperates to effect let-back, a controller forand normally maintaining the pawl out of contact with the ratchet, andmeans to arrest take-up temporarily, said means at such time actuating,the controller to effect release of the let-back pawl and permit it tocooperate with the ratchet.

3. In a loom, in combination, take-up mechanism, means to arrest itsoperation automatically upon the occurrence of a warp or a fillingfault, a let-back device, including a letback pawl and means to move thepawl into inoperative position and normally retain it inoperative, andto move it into position to operate only when take-up is arrested.

4. In a loom, in combination, take-up mechanism, actuating meanstherefor normally connected therewith, a let-back device, including alet-back pawl, and means to move the pawl into position to operate whenthe take-up mechanism and its actuating means are disconnected and tocooperate with and positively move the pawl into inoperative positionwhen said mechanism and its actuating means are connected.

5. In a loom, the combination, with takeup mechanism, actuating meanstherefor, and an instrumentality to release said mechanism from thecontrol of said means upon a redetermined change in the operation of the00m, of a let-back device, comprising a ratchet and a let-back pawl, acontroller for the pawl, normally maintaining it out of contact with theratchet, and means whereby the operation of said instrumentality causesthe controller to permit the pawl to operate only when the take-upmechanism is released from the control of its actuating means.

6. Take-up mechanism, a let-back pawl and a ratchet with which itcooperates to effect let-back of said mechanism, and means to remove thepawl from contact with the ratchet when the take-up mechanism is inoperation and to permit the engagement of the awl with the ratchet whenthe operation of the take-up mechanism is arrested.

7. In a loom, take-up mechanism, actuating means therefor normally inoperative connection therewith, separate devices to disconnect the saidmechanism and its actuating means upon the occurrence of warp andfilling faults, respectively, a let-back pawl and a ratchet with whichit is adapted to cooperate, to permit let-back of the take-up mechanism,a controller to hold the said pawl out of contact with the ratchet or topermit its cooperation with the ratchet, and means to cause saidcontroller to release the pawl when the actuating means is disconnectedfrom the take-up mechanism and to retract the pawl when the saidmechanism is connected with its actuating means.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ALONZO E. RHOADES.

Witnesses:

EDWARD DANA Oseoon, ALBERT W. EDWARDS.

